h = 0.05;
 
Point(1)={-1.0, -1.0, 0, h};
Point(2)={1.0, -1.0, 0, h};
Point(3)={1.0, -0.1, 0, h};
Point(4)={1.0, 0.1, 0, h};
Point(5)={1.0, 1.0, 0, h};
Point(6)={-1.0, 1.0, 0, h};
Point(7)={-1.0, 0.1, 0, h};
Point(8)={-1.0, -0.1, 0, h};
Line(1) = {1, 2};
Line(2) = {2, 3};
Line(3) = {3, 4};
Line(4) = {4, 5};
Line(5) = {5, 6};
Line(6) = {6, 7};
Line(7) = {7, 8};
Line(8) = {8, 1};
Line Loop(1) = {1,2,3,4,5,6,7,8};
Plane Surface(2) ={1};
Physical Surface(2) = {2};
Physical Line(1) = {1, 2, 3, 4, 5, 6, 7, 8};
Coherence;